We should also acknowledge that the whole concept of 'expected value', while commonly used, is perhaps not the best measure in situations such as these. Even in very simple situations, it gives results that are, well, not very reasonable.
For example, suppose I have you flip a coin. If you get heads, I give you $1. If you get tails, you get to flip again. On the second flip, if you get a heads, you get $2. If you get tails on the second flip, then you can go again. if you get heads on the the third flip, you get $4. Otherwise, you can flip again.
The payoff doubles each time you get a tail until you get a head, when you get your payment.
So, the question is how much you should expect to pay for such a game? The paradox is that the expected value of the game is infinite. So you should literally be willing to pay any amount to pay this game.
All this shows is that the mathematical notion of expected value isn't very useful in situations like this. And there is no good reason to think it is reasonable in the situation of Pascal's Wager.
Then you contradict most religions', Pascal's and Dr. Jackson's unspoken premise.
The infinite payoff is what makes the wager work even when the probability is infinitesimal.
It is also entirely irrational to assume something infinite in a finite universe, and leads to all the mathematical paradoxa with multiple infinities.
And most people are unable to calculate with infinities - which in the case of Dr. Jackson lead to the belief that she might have salvaged Pascal's Wager.
What the statement of the case misses is depreciation because of time. Even if you live forever, the present value of that future life is finite. And that makes the payoff finite even in the case of immortality.